Another common op-amp circuit is the inverting amplifier (Figure 4). As the name implies, the output voltage is amplified with opposite polarity as the input. ... “Summing Amplifier,” US Patent ...

The schematic in Figure 1 is a common summing amplifier with multiple inputs and one single-ended output. It is a variation of a standard inverting amplifier. Point X is a virtual ground and is ...

In the circuit, R1 and R2 have been chosen such that R2 = 2R1. So the voltage at Vb = -2Vin. Thus during the positive half cycle of the rectified voltage Vb is applied to terminal B of the inverting ...

A summing network can also be added to the non-inverting input, similar to that at the inverting input (Fig. 2). 2. In an inverting and single non-inverting input op-amp summer, R1-R3 interact to ...